Combined drain and strainer



Aug. 17, 1937, F c KUHNLE 2,090,299

COMBINED DRAIN AND STRAINER Filed Feb. 15, 1936 2 Sheets-Sheet 1 M [5%l6 l4 INVENTOR.

firmer/f 6'. fife/mu By M MAM A TTORNEYS.

Aug. 17, 1937. F. c. KUHNLE COMBINED DRAIN AND STRAINER 2 Sheets-Sheet 2Filed Feb. 13, 1936 .mi [W o 74 INVENTOR. firm/ca 6'. if/mar A TTORNEYS.

Patented Aug. 17, 1937 UNITED STATES PATENT OFFICE- COMBINED DRAIN ANDSTRAINER Frederick O. Kuhnle, Spring Lake, Mich. Application February13, 1936, Serial No. 63,710

4 Claims.

My present invention relates to improvements in drain and strainerfittings for sinks, wash bowls, wash tubs, ,tanks and the like, andparticularly .to a combination drain valve and strainer therefor; andthe objects of improvements. are, first, to provide such a combinedstrainer and drain valve that will be positive in its operation; second,to provide such a strainer and valve that can be readily cleaned; third,to

provide a combined strainer and drain valve that will be cheap to make;and, fourth, to provide a combined strainer and valve easy to dismantle.

I attain these objects and others that will be apparent from a perusalof the description of the structure disclosed in the accompanyingdrawings, in which:

Figure 1 is a top plan view of the combined strainer and valve as whenapplied to a kitchen sink with a fragmentary portion of the sink bottomsurrounding the drain body.

Figure 2 is a sectional view of the combined strainer and drain taken online A--A of Figure 1.

Figure 3 is a sectional view taken on line B-B of Figure 1. v

Figure 4 is an enlarged sectional view of the drain valve and of theupper end of the valve locking post.

Figure 5 is an enlarged view of the valve locking spring, and

Figure 6 is a sectional view on line CC of Figure 3 looking downward.

Throughout the several views of the drawings, similar numerals refer tosimilar parts.

The drain housing, preferably made in two sections consisting of anouter shell I and an inner shell 2, is provided at its top with a curvedannular flange 3 resting into recess 4 of the bottom 5 of the sink, tub,bowl, or tank. In

spaced relation to the flange 3 on the outer shell I of the housing arescrew threads 6 engaged by annular ring nut 1. Between the lock nut Iand the turned flange 8 of the bottom 5, is interposed annular packingmember 9 and metal washer III of compressible packing material. At thelower portion of the housing is downwardly extending neck II, havingscrew threads I2 engaging threads in gland nut I3 by which drain pipe I4having external flange I5 is attached to the housing. Extending acrossthe opening I5a of the neck of the inner shell 2 and resting againstinwardly extending flange ill of the outer shell I is a perforatedlocking post supporting member II.

The upper end of the locking post I8 is of conical form and adjacentthereto is annular locking groove I9 engaging the hairpin locking spring20 carried in grooves machined into opposite sides of the tubular valvestem 2|, screw threaded into the valve 22 resting in its closedposition, as shown in Figure 3, against valve seat 23. The valve stem 2iextends upward through an orifice 23a in the solids catch basket 24 andis provided at its upper or free end with a knob handle 25. Through thesides and bottom of the basket 24 are drain holes 28 whereby fluids arepermitted to escape from the basket to be conveyed by the drain pipe I4.At the upper rim of the basket 24 is outwardly extending curved flange26 by which the basket 24 is supported in the housing shell I and inspaced relation to the bottom thereof by the annular shoulder 21 at thetop of the inner shell 2. Figure 2 illustrates the valve 22 raised as bythe knob handle 25 from the annular seat 23 as when in the drainingposition. Figure 3 illustrates the valve 22 in its closed positionresting against the annular seat 23.

In the manufacture of my. present invention it is preferred to producethe housing having an outer shell I and inner shell 2 and the basket 24from sheet metal such as sheet brass by punching, drawing or spinning,machining on the outer shell threads 6 engaging lock nut l and trimmingthe annular edge of the flange 3; the, valve stem 2i from tubing, andthe balance of the parts from solid metal; polishing the exposed partsand electro-plating the same with chromium or other desired metal.

In the assembling of my improved drain and strainer fitting, the housingis placed in the hole of the sink, tub, tank or the like, with itsannular flange 3 resting on the shoulder of the hole, the packing 9placedaround the housing and against the flange 8 with the washer I0interposed between the packing and the ring nut I, the ring nut I beingscrewed tightly to compress the packing and prevent leakage of fluidbetween the housing and the sink. The drain pipe I4 is then connected tothe housing by the gland nut I3. The basket 24, together with the valvestem 2| and valve 22, is placed within the housing with the flange 26 ofthe basket 24 supported on the annular shoulder 21 formed by the topedge of the inner shell 2 and the valve stem enclosing the locking postI8 having locking groove I9 engaged by locking spring 20 when the valve22 is raised to open position, as shown in Figure 2, in which positionthe valve is held by the hairpin locking spring 20 until forced toclosed position, as shown in Figure 3, by force exerted on the top ofthe knob handle 25. Such iorce exerted causes the hairpin locking springII to spread and ride over the shoulders of the sloove is and allows thea valve 22 to be moved to close position against the seat 23, closingthe space between the valve and seat, thus preventing escape of fluidsirom the sink.

Having described the present invention, the

rights I wish to claim and desire to secure by Letters Patent are:

1. A combined drain and strainer for sinks and the like consisting of ahousing comprising outer and inner shell members, the outer shell member16 having an outwardly extending flange at its top.

a downwardly extending neck having at its bottom, a shoulder formed bythe top of the inner shell member adjacent said flange, a perforatedmetal strainer basket extending into the housing 20 and supported onsaid shoulder, a valve seat in said inner shell above said neck, a valveresting on said valve seat when in its closed position and having atubular valve stem screw threaded through said valve and having ahairpin locking spring at its lower end carried in slots in the saidvalve stem and a locking post rigidly supported in the said neckextending into said valve stem, the said locking post having an annulargroove engaging said locking spring when said valve is withdrawn fromthe valve seat to its open position.

2. A combined drain and strainer comprising a housing comprising outerand inner shell members having an annular outwardly extending flange atthe top of the outer shell member, a neck portion at its bottom, a valvelocking post rigidly supported in said neck and having at its top anannular locking groove, a valve for closing said neck when in its lowerposition and having a tubular stem with a hail-fin locking springcarried by the said valve stem for locking said valve in its openposition by enga ing said annular groove of said locking post.

3. A combined drain and strainer comprising a housing having asupporting flange, a hollow drain pipe connecting neck, a removablestrainer basket supported within thehousing and having at its axis anopening, a valve above said connecting neck i'or closing the same andhaving a tubular stem extending through the axial hole in the basket toform a handle whereby the valve may be raised from the neck closingposition, a valve locking post rigidly supported in said connecting neckand having a groove in spaced relation to its support and a springcarried by said tubular stem for directly engaging said groove when thesaid valve is in open position.

4. A combined drain and strainer comprising in combination, a hollowshell-like body'havin'g at its top an outwardly extending annularflange,a downward extending hollow neck in spaced relation to said annularflange and having at its upper end within the body a valve seat, anannular shoulder within the body intermediate the said annular flangeand the valve seat, a strainer basket having a hole through its bottomand an annular flange at its top resting on the annular shoulder withinthe said body, a valve for closing the hollow neck by engaging the saidvalve seat, and having a tubular stem extending upward through the saidhole in the bottom of the said basket and a spring carried by thetubular stern and a Post extending axially of the said body and saidneck and having an annular groove for engaging with said spring wherebythe said valve is held out 01 engagement with the said valve seat whenraised therefrom.

FREDERICK C. KUHNLE. z

